feat(ui): 添加返回按钮并优化界面布局

- 在数据抓取页面添加返回按钮
- 实现返回上一场景的功能
- 重新组织按钮区域布局
- 优化按钮样式和交互效果
- 调整主容器组件排列顺序
- 增加平台选择页面的代码结构调整

src/main/java/com/fantaibao/page/DataCrawlView.java

@@ -16,8 +16,12 @@ public class DataCrawlView {
     private DatePicker startDatePicker;
     private DatePicker endDatePicker;
     private Button crawlButton;
+    private Stage primaryStage;
+    private Scene previousScene;
 
     public DataCrawlView(Stage primaryStage) {
+        this.primaryStage = primaryStage;
+        this.previousScene = primaryStage.getScene();
         initialize(primaryStage);
     }
 
@@ -81,6 +85,28 @@ public class DataCrawlView {
         formPane.add(endDateLabel, 0, 2);
         formPane.add(endDatePicker, 1, 2);
 
+        // 按钮区域
+        HBox buttonBox = new HBox();
+        buttonBox.setAlignment(Pos.CENTER);
+        buttonBox.setSpacing(20);
+
+        // 返回按钮
+        Button backButton = new Button("返回");
+        backButton.setStyle("-fx-background-color: #cccccc; -fx-text-fill: #333333; " +
+                "-fx-font-size: 16px; -fx-font-weight: bold; -fx-padding: 12px 36px; " +
+                "-fx-border-radius: 30px; -fx-background-radius: 30px; " +
+                "-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 10, 0, 0, 0);");
+        backButton.setCursor(javafx.scene.Cursor.HAND);
+        backButton.setOnMouseEntered(e -> backButton.setStyle("-fx-background-color: #bbbbbb; " +
+                "-fx-text-fill: #333333; -fx-font-size: 16px; -fx-font-weight: bold; " +
+                "-fx-padding: 12px 36px; -fx-border-radius: 30px; -fx-background-radius: 30px; " +
+                "-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.3), 15, 0, 0, 0);"));
+        backButton.setOnMouseExited(e -> backButton.setStyle("-fx-background-color: #cccccc; " +
+                "-fx-text-fill: #333333; -fx-font-size: 16px; -fx-font-weight: bold; " +
+                "-fx-padding: 12px 36px; -fx-border-radius: 30px; -fx-background-radius: 30px; " +
+                "-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 10, 0, 0, 0);"));
+        backButton.setOnAction(e -> handleBackAction());
+
         // 开始抓取按钮
         crawlButton = new Button("开始抓取");
         crawlButton.setStyle("-fx-background-color: #4CAF50; -fx-text-fill: white; " +
@@ -100,8 +126,11 @@ public class DataCrawlView {
         // 为按钮添加点击事件
         crawlButton.setOnAction(e -> handleCrawlAction());
 
+        // 添加按钮到按钮区域
+        buttonBox.getChildren().addAll(backButton, crawlButton);
+
         // 将组件添加到主容器
-        root.getChildren().addAll(titleLabel, formPane, crawlButton);
+        root.getChildren().addAll(titleLabel, formPane, buttonBox);
 
         // 设置场景并显示窗口
         Scene scene = new Scene(root, 500, 450);
@@ -141,6 +170,14 @@ public class DataCrawlView {
                 "数据抓取任务已启动！");
     }
 
+    private void handleBackAction() {
+        if (previousScene != null) {
+            primaryStage.setScene(previousScene);
+        } else {
+            new PlatformSelectionView(primaryStage);
+        }
+    }
+
     private void showAlert(Alert.AlertType alertType, String title, String content) {
         Alert alert = new Alert(alertType);
         alert.setTitle(title);